
public class tuna {
	private String firstname;
	public String getLastname() {
		return lastname;
	}
	public static int getMembers() {
		return members;
	}
	public String getFirstname() {
		return firstname;
	}
	private String lastname;
	//Biến static cho ta biết rằng giá trị members sẽ được thay đổi
	private static int members = 0;
	public tuna(String fn, String ln){
		firstname = fn;
		lastname = ln;
		members++;
		System.out.printf("First name is %s %s and members is: %d\n",firstname,lastname,members);
		}
}
